| Answer | Crossword Clue |
|---|---|
| INVACUO | Where the speed of light is constant |
| OUCAVNI | How the speed of light is measured |
| METHLABS | Workplaces where speed is the first order of business? |
| FAIR | Where the Tower of Light is. |
| BARGAINBASEMENT | Where the price is light |
| ONE | Where the needle is when the gas light is lit |
